The muscles that allow the fingers to bend inwards are called flexor muscles. They are connected to the finger bones with cord-like tendon-like structures arising from the muscles in the forearm. Flexor muscles start from the elbow or forearm and turn into tendons in the middle parts of the arm and extend to the fingertips (Figure 1). Flexor tendons in the fingers pass through tunnels called pulleys. Pulleys prevent the tendon from moving away from the bone by forming tunnels on the tendon and provide more active functioning of the joints. If the tendon ends are not brought together surgically, healing cannot be achieved. If the repair of tendon cuts is delayed, the length of the tendon shortens due to the pulling of the muscle to which the tendon is attached and it may not be possible to bring the tendons together. Protection of the tunnels called pulleys through which the tendons pass in the fingers is very important for the tendons to fulfil their functions after healing. Vascular nerve structures that are very close to the tendon must be repaired with microsurgical methods during surgery. After the surgical intervention, splinting is performed for 3-4 weeks to protect the sutured structures. It is not possible to provide movements immediately after the plaster is removed. Adhesions to surrounding tissues occur during tendon healing. Early physiotherapy can be started while the cast is on or physiotherapy should be given after the cast. After flexor tendon injuries, it is usually necessary to get professional physiotherapy help. If it is insufficient to provide movements despite physical therapy, the adhesions around the tendon should be opened and physical therapy should be started immediately. It is important to start physical therapy in the early period. If physical therapy is not started on time, it is difficult to regain the movements later.